Resistance unit



Sept. 7 ,1926. 1,598,884

L. B. SAUL-:R ET AL RESISTANCE UNIT Filed April 17 1924 Patented Sept.7, 1926.

1,598,884 PATENT UFFICI-..

LOUIS B. BAUER, OF WESTERN STRINGS, `.AND `(zrEORIGE A. YA'NOCHOWSKI, 0FLA 'GRANGE IL'LINGIS, 'ASSIGNORS TO KELLOGG SWITCHBOARD AND SUPPLY COM-TAN'Y, 0F CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS.

RESISTANCE VUNIT.

.Appution lined `Api-n 17, v1924. serial No. 707,045.

Our invention relates :to resistance units -and is krparticularlyadapted to be employed yin .ignition systems wherein ythe main circuitis 'intermittently interrupted such as .are

now-employed in automobile ignition systems rand the like.

.A.n objectof our invention is the provision of n siniple,durable andcheaply constructed resistance .unit whose parts are simple in structureand very leasy to assemble into a 'single mountable unit.

Another' feature of our invention is the manner rand means employed forsecuring the diii'erent parts of .our resistance unit to- :getheragainst displacement and movement relative to each other` to form asingle .mountable operating lunit.

A further .feature of our `invention is the simplified .manner in whichwe secure our vresistance unit yto ,the device with which our inventionmay be used. g f

'Still another feature :of Vour invention is the ovisionrof simplifiedYmeans for conductive y connecting the resistance unit of our inventionin circuit with the 4operating circuit-ot the device, with which ourresistance unit is utilized, independently of the means which we employfor securing our resistance unit to said device and `which securingmeans also forms la featureof-our invention.

The above features, as well as others, will 'be more `specificallypointed out in the Aensuing specification and fora more complete and`clearer understanding of our invention 'reference may be had to the.accompanying drawings, in which `like reference characters in theseveral views denote like parts.

In the drawings:

Fig-.1 is a top plan view of the resistance unit fof our invention,showing the same secured lto ythe casing of `a distributing unit, `tlaetop or covered.: said distributing unit being removed to expose certainoperating parts of the distributing unit. This figure also shows themeans We employ for conduc- `tively connecting our resistance unitincircuiri'. with the operatingr circuit of the distributing unitsecured to the casi-ng yof said distributing unit;

Fig. 2 is a plan view in Ielevation of the resistance unit and circuitconnecting means of our invention showing the same secured tu the casingof the distributing unit;

Fig. r3 is n right side view of Fig. Q;

Fig. 4 is a sectional view of the resistance unit of our invention alongthe line 4-4 of Fig. 2; and

Fig. 5 .is a sectional view of the resistance yunit and means forconnecting the same in circuit with the circuit .control meansof 4thedistributor unit of our invention along .the .line 5 5 of Fig. 2.

.Referringnow particularly to the distrib- .utingunit DU with which weAillustrate and n describe our invention, we will first point out ingeneral a few of the important parts or elements of said distributingunit.

EC is an venclosing casing afor enelosimg .and supporting various partsofthe distributing unit DU, which Veasing is iprovided with a pair ofyspring members or vlatches L for holding a suitable .top or cover onsaid casing and is also provided with an yintegrally formed member orbracket B .for adjustmounting fthe unit .DU in operative .position byany suitable means. A pair of interruptor contacts C are provided whichare pivotally supported on a removable conducting plate P secured .inthe -casing EC and are spring pressed finto` contactual engagement witha pair aoi stationary contacts C to close the ignition circuit,controlled by the distributing unit DU, throughsaid stationary contacts.`A cam member CM is provided which is secured rto .the rotatable shaftof the distributing unitandis 4adapted to yrotate -with the shaft Atooperate the .pair oi" interrupter contacts C to interrupt the contactualenfragement of said interrupter contaets C an a ,pair of stationarycontacts 4C for .purposes well known to those skilled lin the art. Acondenser D is also 'provided which is suitably secured .to a .Hat faceportion `of 'the casing EC and .is adapted to be connected in theoperating circuit for lthe well ,known purposes. For a clearunderstanding of our invention further description `ot .the distributingunit DIU is thought unnecessary and will., therefore, not be given.

Referring now in detail to the resistance unit RU of our invention, itcomprises a re- `.sistance element carrying member 2, circular in shapeand `for-med out of suitable insulaof a pre-determined resistance. Theflat faces et' tie member' 2 have integrally toi-ined therewithrectangularly shaped extending lugs 7 and 8 tor purposes to be describedpresently. A disk member 9 ot suitable conducting material is providedand has a rectangular centrally located opening 10 of a size to permitsaid member 9 to lit snugly around the rectangular lug 'T ot the member2 so that one tace ot' the disk member 9 engages the tlat circular face5 ot the member 2, while the end ot the lug T tlush with the other taceot the disk member 9. A protector 12 formed out ot suitable conductingmaterial having an interrupted tlange 13 integrally 'formed therewith isprovided. The protector 12 has a rectangularly shaped and centrallylocated opening 15 ot a size to permit said protector to lit snuglyaround the integrally formed lug 8 ot the insulation member 2 so thatthe face 16 of the protector 12 engages the circular face G ot theniember 2, the end ot' the lug 8 being flush with the other face 1T ot'the said protector 12. The flange 13 is cut away at certain places toavoid wrinkling of the said tlange when the same is formed on theprotector 12 and to also permit passage of air currents, as do also theorifices 1S provided in the protector 12 as will be pointed out more indetail in the ensuing specitication. An ear 19 is integrally formed withthe protector 12 and has an opening 2O provided in its :tree end throughwhich a suitable screw 21 extends, said screw 21 extending through aU-shaped clamping member 22 and then has screwthreaded engagement with asuitable nut` 23. The clamping member 22 and free end of the ear 19 areadapted to receive and have clamped there between an external conductorby means of the screw 21 and nut 23.-

To secure the protector 12 and disk member 9 on the insulation member 2against displacement a terrule 25 is provided which extends throughsuitable aligned openings in a metal washer 26, and an insulation washer2T. then through a central opening in the insulation resistance elementcarrying member 2 and through a suitably aligned opening in aninsulation washer 28, whereupon both protruding ends et the said terrule25 are spun over by a spinning operation whereby the insulation washer2T engages the outer tace of protector 12 and the end ot the lug and theinsulation washer 28 engages the outer 'tace o'l" the member 9 and theend ot the lug` 'T of the insulation member 2. The protector 12 and thedisk member 9 are now clamped and secured on the insulation meinber 2against displacement by the washers 2G. 2T, 2S and the terrule 25, andagainst rotation on said member 2 by the engagement ot the rectangularlugs 7 and S whichextend snugliY through suitable rectangular openingsin the protector 12 and member 9 as described above. The insulationwasher 2T insulates the protector 12 trom the metal washer 26. while thesaid insulation washer 2T and the lug S insulate the said protector 12'from the tei-rule 25, and the insulation washer 28 and 7 ot' the member2 insulate the disk member 9 from the said lterrule then the parts oithe resistance unit llll are assembled as described above the helicalresistance element 4 has its one end tied or soldered to an ear 8()integrally :termed with and at right angles to the member 9 and is thendrawn taut around the insulation inember 2 in the groove or lhannel 23ot said member 2 and has its other end tied or soldered to an xar 3lintegrally liornied with the tlange 123 ot the protector 12. rl`hchelical resistance element il will remain in the channel 3 ot member 2due to its spring ellect and the protector 12 and member 9 serve asterminals tor said resistance element il. The flange 13 ol' theprotector 12 serves to protect the resistance element 4;, and the cutaway portions o'l said flange 17;) and the orilices 1S permit aircurrents to pass therethrough to the resistance element l tor coolingpurposes.

N ow in order to secure the resistance unit RU of our invention to thedistributing unit DU as a single unit and in operative position relativethereto, we provide a suitable screw which extends through the centralopening 3G in the terrule and then through a suitable opening 23T in theenclosing casing EC ot the distributing unit DU and has screw-threadedengagement with a suitably tapped nut 39, a suitable spring asher s0being interposed between the nuty 39 and the inner tace ot the casinglE@ to prevent the nut 39 trom loosening and disengaging the screws b5 ofown accord or by the vibration ot the distributing unit DU. The nut 39drawn in on the screw 35 whereby the resistance unit llll is secured inposition on the casing EC. It will be noted, however. that the protectorand disk member 9 oi the resistance unit RU are not in any*ayconductivcly connected to the easing 'EC ot the distributing unit DU.consequently there will be no circuit closed through the protector 1.2,resistance clement fl and member 9 to the casing ,C when an externalconductor is clamped between the U-shaped member 22 and ear 19 ot theprotector 12 although the screw 9,9 has direct contactual engagementwith the caring EC.

To connect the resistance unit itil' in cir cuit with the ignitioncircuit controlled by the interrupter contacts C and stationary.'contacts C. we provide au arm lll which is integrally formed with thedisk member .i

and has its i'ree end biturcated. fr scr/er.' lf2 is provided whichextends through a terminal member -il-IB. bilurcated end7 ot the arm49., insulation bushing `l-l. nigh a coa IES) ducting member 45Vintegrally formed with "the removable plate 46 ofthe distributing unitDU, said plate 46 ybeing connected in circuit With the contacts C and C.The terminal member 43 is rovided for receiving a conductor exten ingfrom the condenser D and is connected With vthe arm 40 through the metalwasher 46 and screw 42. 'lhe `screw 42 has screw-threaded engagementwith a suitably tapped nut 47 which is screwed down against theconducting member 45 to secure said screw 42 and parts engagingsaidscrew in position. The screw 42 is insulated from Athe casing EC bythe insulation bushing 44; the bushing 4 4 and insulation washer 5()insulating the arm 40 `from the casing EC and the insulation bushing 44and #insulation Washer 5l insulating the conducting lmember 45 of theremovable plate 46 from the said casing EC. Thus it will gbeapparentthat the resistance unit RU -is in no Wayconductively connected I'to the`enclosing casing EC ot' the distributing unit DU.

The arm 40 of fthe member 9 need not be provided as anysuitable flexibleconductor' may be employed and suitably connected to the screw 42 andsoldered lto the said member 9 and it isto be understood that We do notWish to be limited to the use of the rigid integrally ft'ornied arm 4()as shown and described.

To remove the resistance unit VRU from the distributing unit DU allxthat is necessary is to remove the screw 35 and "loosen the screw 42which permits the removal of. the arm 40 from the screw 42 *through thebifurcated end of said arm 40 which engages said screw 42.

From vthe foregoing description it will be at once apparent thatourresistance unit RU is secured to the casing EC of the distributingunit DU independently of the movable and stationary contacts C and C andthe other operating parts o'f the said distributing unit, and that thesaid resistance unit may be removed Without interfering with saidcontacts Aand said operating parts.

While We have illustrated and describeda preferred embodiment ofourfinvention We do not wish to be limited to the exact structure asshown and described as changes and modi tcations Awill readily suggestthemselves without departing lfrom our invention and it is to beunderstood that we intend'to cover and claim all that which may comesvithin the spirit and scope of the appended claims.

What we claim as new and desire to secure by United States LettersPatent, is:

1. A device of the class described including a non-conducting supportingmember having a central opening, conducting members supported by'saidsupporting member, insulation Washers engaging said conduct.- ingmembers, a cylindrical member yof con- W. hers for engaging said lugsducting material extending through said central opcinngand said Washersand having kits ends distorted to secure said conducting bers.

2. A device of the class described includ- :ing an insulation memberhaving a pair of rectangularly shaped lugs integrally formed therewith,a pair of conducting members having rectangular openings for receivingsaid flugs and adapted to engage said insulation member, a pair of'insulation Washers for engaging said conducting members and the freeends of said lugs, a central opening in said insulation member, acylindrical member for engaging said Washers and said opening in saidinsulation member and adapted to have its end spun over to prevent itsremoval andto clamp said conducting members between said insulationmember and said insulation Washers to form a single ymountable unit,said lugs preventing rotary movement et said conducting members and alsoadapted to insulate said conducting members from said cylindricalmember, and a resistance element supported on said insulation memberhaving its ends secured to said conducting members.

3. A resistance unit comprising a pair of terminals, a supporting memberof non-conducting material interposed between said terminals, insulationwashers for engaging said terminals, a cylindrical n'ieinber for eX-tending through said Washers and said support-ing member and having itsends upset to secure said Washers and terminals on said supportingmember, a resistance element supported on said supporting member andconnected in circuit with said terminals, and protruding membersintegrally formed with said su pporting member for insulatingl saidterminals from said cylindrical member and to prevent rotary movement otsaid termiynais Lrelative to each other and to said supporting member.

4. A device of the class described including a pai-r ot' conductingmembers having llO rectangular centrally located openings, a re- 4sistance element supporting member inter- ;posed between said conductingmembers and *having integrally 'formed thereivitl'i rectangulaily shapedlugs Yior engaging said openi s in said conducting nienib., as,insulation and said conducting members, an opening extending throughsaid supporting member and said lugs, a cylindrical member tor engagingsaid opening and adapted to have its ends distortezl vvhereb)Y saidconducting members are clamped on said lugs between said supportingmember and said vv: shers to t'orm a singie operating unit. and aresistance element supported on said supporting member and having oneet' its ends secured to one ot said conductingl members and its otherend secured to the other ot said conducting members.

)L device oitl the class described including a nen-co iductingsupporting member, a pair et' conducting members provided withcenti-all)v loca openings, means including` a cylindrical memberI Y'i'orsecuring said conducting meml ers on said supporting memb r, membersintegrallyv Ytermed vvith said supporting member Yfor engaging theopenings in rsaid conducting members to prevent rotation otl saidconducting men'ibers relaive te each other and te said supportingnaemler and also to insulate said conducting members 'from saidclvlindri Aal member, and nce element supported on said supA poi inmember and having its ends secured to said conducting members.

G. A device oit' the class described including a non-eoiuluctingsui'iporting member, a conducting member having an integrally tormedtlange and a rectangular central opening', a rectangular memberintegrali)Y formed with said supporting member and adapted to engagesaid central opening in said conductingl member so that the tlange otsaid conducting material extends over the periphery ot said supportingmember, another conducting member having a rectanguiar central openino,another rectangular member integrall)r formed with said supportingmember opposite to said tirstreetangular member 'for engaging theopening in said second conductingmember, means including a? cylindricalconducting member Ytor securing said conducting members on saidsupporting member against displacement, said rectangula members adaptedto insulate said coi'iducting members from said t-,vlindrical conductingmember, and a resistancey element supported on said supporting men'iberand having` its ends secured to said conducting` members, the flange ofsaid tirf-t conducting men'iber adapted to protert said resistanceelementI against injurj'.

T. fr device ot the class described including a tlat circular supportingmember of non-conducting material and having intelgrallv Ytormezltherewith a rectangular member on cach side ot' said supporting member,a pair oi? conducting members each having a rectangular opening, one ofsaid conducting members adapted to tit over one oit said rectangularmembers and engage one.

side ot the supporting member While the other ot said confluetingmembers lits over the other rectangular men'iber ot said supportingmember, insulation Washers tor engaging said conducing members, andmeans including a conducting cylindri :al member tor clamping' saidconducting inemliiers on said supporting member againsty displacement toform a single mountable unit, and a helica resistance element draivntaut around said supporting member and having one ot ends secured to oneoit said coeiducti ig members and its other end secured to said otherconducting meniber vi'herebliv a circuit is closed through saidconducting members via said resistance element.

S. A device ot the class described including a non-condmtingsuljiporting member havinga circumferential groove 'termed therein, apair et non-circular members integrally Ytermed .vith said supportingmenr ber, saitV supporting central opening extending through saidien-circular members, a pair et conducting members tor litting over saidnen-circular members and adapt-ed to engage said supporting member,insulation Washers Afor enk ging said conducting members, a cvliirdrcal'member tor extending through said central opening and saidv'ashers and having its tree ends distorted vvhcreb)v said conductingmembers are clamped on said supporting member between said distortedends to prevent their displacement, said non-circular members adapted toprevent rotar)Y movement et said conducting members relative to eachther and to said supporting member, and a resistance element resting insaid circumferential `groove and having its ends connected to saidconductingl members to connect said conducting members in circuit.

9. 'X device ot' the class described ineluding an insulation member, apair ot rec1 tangular lugs formed integrali)r with said member, a pairot conductingl members provided vvith rectangular openings adapted toreceive said pair ot lugs, insulation `Vasi ers ifor engaging said pairo1 conducting ineinbers and said pair oll lugs, a iterrule `tor engagingsaid insulation membel and insulation washers having its ends spun overto secure said pair ot conducting members and Vashers on said insulationmember to itorm a single i'nountablc unit, and a metal washer interposedbetiveen one Ot said washers and one ot the spun over ends ol saidit'errule.

lO. A device oi the class described including an insulation menilierhaving a central opening and a circumiterential groove. z pair ofrectangular lugs itormed integrallyY with said member and through whichsaid opening extends, a pair ot' tern'iinals having rectangular openingsand adapted to tit over said lugs and engage said msulation memmemberprovided with ber, a cylindrical member extending through said centralopening and having its ends turned over to prevent its removal, insulantion washers interposed between said turned over ends and the ends ofsaid pair of lugs, said cylindrical member' adapted to clamp saidwashers and terminals on said insulation member against displacementandsaid lugs adapted to preventrotary movement of said terminals, and toalso separate said cylindrical member from said lugs, a resistanceelement secured to said terminals and adapted to engage saidcircumferential groove, and a flange integrally formed with one of saidterminals for protecting said resistance element against injury, saidone terminal having openings for permitting air currents to passtherethrough to said resistance element.

1l. A device of the class described including a pair of terminals havingrectangular openings, an insulation member having rectangular lugsintegrally formed therewith interposed between said pair of terminals,

said lugs adapted to extend through the openings in said terminals, anopening for said insulation member extending through said pair of lugs,a ferrule engaging said opening for clamping said terminals on saidinsulation member against displacement, insulation washers and a metalwasher for engaging said fel-rule, said ferrule having its ends spunover to clamp said terminals between said insulation member and saidwashers to form a single mountable unit, said lugs engaging saidrectangular openings to prevent rotary movement of said pair ofterminals on said insulation member, and a resistance element supportedon said insulation member and having its ends secured to said pair oitterminals whereby said terminals are included in circuit with each othervia said resistance element.

Signed by us at Chicago, in the county of Cook and State of Illinois,this th day of April, 1924.

LOUIS B. SAUER. GEORGE A. YANOCHOVSKI.

